Valve



Feb. 4, 1 930. G. ROBERTS ET AL 1,746,055 vALvE Filed April 18, 192a l612/2 iafieri;

2 Ourinvention permits the use for a maximum flow.

Patented Feb. 4,1930

UNITED, STAT- s PATENT? QFFICE )GLEN nonnnrs Ann MARTINIUS DYSTI-IE, orMINNEAPOLIS, MINNEsorA vALvE Application filed April 18,

our present invention relates to an im- 'proved' valve and moreparticularly to'a regulating valve for general use, but especiallyadapted for use in an oil'supply line to accurately meter a flowof oilto a'burner,

' and has for its primary object to provide a valve with a maximumadjustable limitand To the above-end, generally stated, the

invention consists of the novel devices and Y combinations of deviceshereinafter described and defined in the claims.

' 'As a safety measure and particularly to reduce fire hazards, it isthe recommendation of the National Board'of Underwriters that.

the 'regulating'valvein'an oil supply line for an oil burner for heatingpurposes have a predetermined maximum flow. .As all reputable firmsinstalling oil burners try to follow this recommendation, it requiresthe use of a plurality of difierent sized'valves for difierent sizedburners and for burners adjustedfor heating systems having ,dif

erent number of feet .of' radiation. 7

7 'f a standard sized valve which maybe very quickly and easily adjustedfora predetermined maximum flow and then re-adjusted fora decreased flowto produce the'prope'r combusac tion for the particular oil burner."will,

thus be seen that in case the valveiis accidentally moved or operated byan irresponsible person to change its adjustment, said valve cannot bemoved'beyond'a set position This valve was passed as type A1 by theNational Board of ,Underwriters, 207 .East Ohio Street, Chicago,Illinois, on February 28,1928. 9 1 In-the accompanying drawings, whichil- I lustrate the inventiomjlike characters indicate like partsthroughout the several views Referring, to the drawings: 1 r "Fig. 1' isa view of the improved-valve principally in central section; gig. 2 is aface view of the indicator wheel; an 7 I r Fig. 3is a perspective viewofthe relatiVe ly fixed maximum. open position stop and shackle f f orleakage. Formed in the body member' l 'is a valve chamber 6 to whichleads from socket of which is vof brass and insures a chamber 6 forco-operation with the valve 192s. Seria1 No. 27O,-8'80.

The improved valve includes a body mem ber 4 having at one end anintegrally formed stufling box 5 having external screw threads. 1, Saidbody member 4 and stufling box 5 are formed froin a piece of colddrawnbrass commonlyreferred to asbar stock, thus'eliminating all danger ofsandholes, pin holes one side of said member an 'internal"screwthreadedpassageway .7. In the opposite end of the body member 4 from thestuffing box 5 is'an internally screw-threaded discharge passageway 8. Aport 9. connects the valve chamber 6to the discharge passageway 8 andwhich porthas a contracted or tapered sec-' tion that aifords a valveseat 10.

A supply pipe 11 whichmay be assumed Y to lead from an oil supply tank,not shown, is connected to the body membert by a union .12, one sectionof which is screwed into the passageway 7'. Said union 12 is of-standardmake and has a ball and socket joint '13, thetight joint between thesections of'said union without the use of a pliable packing. The

receiving end of the pipe 14, which may be.

assumed to lead to; an oil supply tank, is securedfto the body member 4by having its receiving end screwed into the passageway 8;

The movable member of the valve includes" a needle point 15 formed onthe inner end of a valvestem 16, which needle point extends through theport 9 from the valve seat 10 to open or close said port. This-valvestem 16 at its intermediate portion has screwthreaded engagementwith thebody member 4, as indicated at '17,and extends" axially through thestuffing box 5 and outwardly thereof. Obviously, byoperating the valvestem-16, the needle point 15 may be axially projected into contact withthe seat 10 to cl0se: the ports 6, as shown in Fig.1, or 'it may be 1axially retracted by reversely operating said 9 valve stem to open saidport.

Within the stuffing box 5 V are inner and outer glands 18 and 19, theformer of WlilGlI has a press fit with saidboxand isjseated on aninternal shoulderflO formed with said An indicator wheel 23 is appliedto the outer end of the valve stem 16 and affords means by which thevalve stem 16 may be turned to axially adjustthe needle. point 15..

As shown, this indicator wheel 23 is detachably secured to. the valvestem. 16 by' screw threads 24 and is held from becoming loose thereon bymeans of a lock nut 25 and a spring washer 26. Circu'mferentially spacedlocknotches-27 are formed in the periphery of the indicator wheel 23 fora purpose that will presently appear.

(lo-operating maximum open position stops 2.8, and 2.9 are provided, forthe indicator,

wheel 23, and] hence the, needle point 15. Said stop 2.8.is' relativelymovable and the stop 29 is relatively adjustable to vary the maximumflow. through the p0rt'9. The relativelymovable stop 28, as shown is inthe, form of a radially projected pin permanentlysecuredina bore in theperiphery of the indicator wheel, 23. The relatively fixed stop. 2.8,,asshown, is in the form of a flat L-shaped' spring having at one end alarge eye 30 through. which the stufling box 5, projects and. holdssaid, stop, for adj ustment, about the axis of the valve stem 16.

A lock nut 31 onthestutfi'ng box 5 normal,- ly impinges against the stop29and friction,- ally clamps the same onto the body member i andsecurely holds the same where set $0 that the samev cannot heaccidentally moved. The other end portion of the stop 29 extendsparallel to the axis of the, needle valve 16.

and transversely across the indicator wheel .23.. at the. peripherythereof; This stop 29 is arranged to yield radially in respect to theindicator wheel 23, but is rigidly heldin respect. to movementcircumferentially of said wheel. 7

A detent 32 is pressed from the inner face of the stop 29 for entranceinto any one of the lock notches 27 to yieldingly hold. the indicatorwheel 23 where set. The tension of the stop 29 is such that the detent32 will be cammed out 015 the engaged lock notch 2.7 under the rotationof the indicatorwheel 2.3 and ride. over the lock notches 27 until theindicator wheel 23 is stopped and then enter one of the. lock notchesand again hold the; indicator wheel 23.- whereset.

To increase the tension of the stop '29 so that considerable pressure isrequired in turning the. indicator wheel 23. to cam the defian 32 ut of.t e leek. notc es 27. said stop is connected by a shackle to the valve 7stem 16. This shackle 33is in the form of a fiat plate having a bore 8 1at one end through which the valve stem 16 projects and a rectilinearaperture 35 at its other end through which the free end portion'of thestop. 29 projects. Obviously, the shackle 33 by its; connection to thevalve stem 16 is free to turn about the axis of the valve stem 16 duringthe adjustment of the stop 29. The eo-operating stops 28- and 29 aresoarranged that the relatively movable stop 28 engages the relativelyfixed stop 29 to positively limit the opening movement of the needlepoint 15 for a maximum flow through the port 9. To set the. relativelyfixed stop 29 for a maximum flow the needlepoint 15 and the lock nut 31,are operated to release, the stop 29 and permit the same to be set indif ferent circumferential. adjustments. in. re-

spect to the indicator wheel 23. As shown, the outer facev of theindicator wheel. 23 is. graduated into eight equal parts by the digitsnaught to 7,. inclusive, circumferential-1y spaced around the axis ofthe indicatorwheel 23. The lock. notches 27 afiord intermediategraduations between any two of the digits.

Before setting the stop. 29 the operator decides on the maximum flow andthen ad.- justs the needle point 15, accordingly. As shown v in thedrawings, the stop 29'is set in alignment with the numeral 3 on theindicator wheel 23 when the valve is closed and hence it takessubstantially amovement of 180 degrees of the indicator wheel 23 to movethe needlev valve 15 to the maximum open position. It the operatorshould decide that the stop 29. should be setany number of notches.beyondv any one of the numerals on the indicator wheel 23. in order-to.secure the proper flow, he would first turn the stop 29 so that it isaligned with the respective numeral and then slowly move the same andcount the. clicks as the detent 32 drops into the lock notches 27 ,untilthe proper adjustment is obtained. By noting this reading, the needlevalve 15 can 'easily be reset in case it gets out of adjustment.

After the stop 29. has been properly set with the needle point 15closed,,thelock nut is operated to rigidly secure the stop 29 to thebody member a and hold the same where set. With the stop 29 thussecured, the needle point 15 can only be opened to a position in whichthe relatively movable stop 28 comes into contact with the relativelyfixed stop 29 and limits furtherturning move-v ment of theindicatorwheel 23 and thereby determinesv the; maximum flow throughtheport 9. p

The) purpose of the cavity between the screw-threads in the body 4 forthe screwthreaded portion 17 on the valve stem 16 and the lower gland 18is toreceive said screw-threaded portion 17 in case the sameis,

I 7 ing contact with the indicator wheel for yieldscrewed completely outof its threaded engagementwith the body 4 and thereby limit theretracting movement of the valve stem 16 and prevent the samefromunseating or, moving the lower gland 18 out of its set position. Aspreviously stated, the lower gland 18 is secured in the stuffing box 5by a press fit. n 1t is important to note that the needlepoint and itsseat 10 have the same taper to produce a slow feed of oil to the pipe14:.

Whatwe claim is 1. A valve comprlsing' a body 1 member 7 having a port,a rotatable member for open- 2. A valve comprlsing'a body member havinga port,.a rotatablemember for opening or closing the port, an indicatorwheel on the rotatable member, co-operating maximum open position stopsfor the rotatable member, One of which is on the indicator wheel andthus movable therewith and the other of which is in the form of a springarm mounted on the body member for adjustment about the axis of theindicator wheel, said arm havingly holdingthe same where set, means forsecuring the stop on the body member in different adjustments and ashackle for the spring arm mounted to move therewith about the axis ofthe indicator wheel.

3. A valve comprising a body member havinga port, a rotatable member foropening or closing the port, an indicator wheel on the rotatable memberand having circumterentially spaced lock notches, co-operating maximumopen position stops for the rotatable member, one of which is on theindicator wheel and thus movable therewith and the other of which is inthe form of a spring arm mountedon the body member for adjustment aboutthe axis of the indicator wheel, said arm having a detent co-operatingwith the lock notches to yieldingly hold the indicator wheel where set,means for securing the spring" arm to the body member in difierentadjustments, and a" shackle mounted to move with the spring arm aboutthe axis of the indicator wheel and having an aperture through which thespring arm projects.

V 4. A valve comprising a body member hav- 1 ing a port and astuflingbox, a rotatable mema stem having screw-threaded engagement withthe body member and on its inner end a needle point for opening or bercomprising closing the port, said stem being extended through thestuffing box, an indicator wheel on the stem and having in its peripherycircumferentially spaced lock notches, coeoperating maximum openposition stops for the needle point, one of which is on the indicatorwheel and thus movable therewith and the other of which is in the formof a spring 1 arm mounted on the body member and having an, eye throughwhich the stulfing box .extends and holds said arm with freedom foradjustment about the axis of the stem, a lock nut on'the stufling boxfor securing the arm to the body member in different adjustments, saidspring arm-having a detent co-operating with the lock notches foryieldingly holding the indicator wheel Where set, and a shackle for'thespring arm mounted on the stem to swing about its axis and having anaperture through which the spring arm extends.

In testimony whereof we aflix our signatures.

' GLEN ROBERTS.

MARTINIUS DYSTH'E.

